add_object              Add Object
arrow                   Arrow Object
cone                    Cone Object
cube                    Cube Object
cylinder                Cylinder Object
dielectric              Dielectric (glass) Material
diffuse                 Diffuse Material
disk                    Disk Object
ellipsoid               Ellipsoid Object
extruded_polygon        Extruded Polygon Object
generate_cornell        Generate Cornell Box
generate_ground         Generate Ground
generate_studio         Generate Studio
glossy                  Glossy Material
group_objects           Group Objects
lambertian              Lambertian Material (deprecated)
light                   Light Material
metal                   Metallic Material
microfacet              Microfacet Material
obj_model               'obj' File Object
pig                     Pig Object
r_obj                   R 3D Model
render_scene            Render Scene
segment                 Segment Object
sphere                  Sphere Object
triangle                Triangle Object
xy_rect                 Rectangular XY Plane Object
xz_rect                 Rectangular XZ Plane Object
yz_rect                 Rectangular YZ Plane Object
